lattice-minimize.cc File Reference

#include "base/kaldi-common.h"
#include "util/common-utils.h"
#include "fstext/fstext-lib.h"
#include "lat/kaldi-lattice.h"
#include "lat/minimize-lattice.h"
#include "lat/push-lattice.h"

Include dependency graph for lattice-minimize.cc:

Go to the source code of this file.

Functions
int	main (int argc, char *argv[])

Function Documentation

main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 30 of file lattice-minimize.cc.

References SequentialTableReader< Holder >::Done(), ParseOptions::GetArg(), KALDI_LOG, KALDI_VLOG, KALDI_WARN, SequentialTableReader< Holder >::Key(), fst::MinimizeCompactLattice(), SequentialTableReader< Holder >::Next(), ParseOptions::NumArgs(), ParseOptions::PrintUsage(), fst::PushCompactLatticeStrings(), fst::PushCompactLatticeWeights(), ParseOptions::Read(), ParseOptions::Register(), SequentialTableReader< Holder >::Value(), and TableWriter< Holder >::Write().

                                 {
  try {
    using namespace kaldi;
    typedef kaldi::int32 int32;
    typedef kaldi::int64 int64;
    using fst::SymbolTable;
    using fst::VectorFst;
    using fst::StdArc;

    const char *usage =
      "Minimize lattices, in CompactLattice format.  Should be applied to\n"
      "determinized lattices (e.g. produced with --determinize-lattice=true)\n"
      "Note: by default this program\n"
      "pushes the strings and weights prior to minimization."
      "Usage: lattice-minimize [options] lattice-rspecifier lattice-wspecifier\n"
        " e.g.: lattice-minimize ark:1.lats ark:2.lats\n";

    ParseOptions po(usage);

    bool push_strings = true;
    bool push_weights = true;

    po.Register("push-strings", &push_strings, "If true, push the strings in the "
                "lattice to the start.");
    po.Register("push-weights", &push_weights, "If true, push the weights in the "
                "lattice to the start.");
    
    po.Read(argc, argv);

    if (po.NumArgs() != 2) {
      po.PrintUsage();
      exit(1);
    }

    std::string lats_rspecifier = po.GetArg(1),
        lats_wspecifier = po.GetArg(2);


    SequentialCompactLatticeReader clat_reader(lats_rspecifier);
    CompactLatticeWriter clat_writer(lats_wspecifier); 

    int32 n_done = 0, n_err = 0;

    
    for (; !clat_reader.Done(); clat_reader.Next()) {
      std::string key = clat_reader.Key();
      CompactLattice clat = clat_reader.Value();
      KALDI_VLOG(1) << "Processing lattice for utterance " << key;
      if (push_strings && !PushCompactLatticeStrings(&clat)) {
        KALDI_WARN << "Failure in pushing lattice strings (bad lattice?), "
                   << "for key " << key;
        n_err++;
        continue;
      }
      if (push_weights && !PushCompactLatticeWeights(&clat)) {
        KALDI_WARN << "Failure in pushing lattice weights (bad lattice?),"
                   << "for key " << key ;           
        n_err++;
        continue;
      }
      if (!MinimizeCompactLattice(&clat)) {
        KALDI_WARN << "Failure in minimizing lattice (bad lattice?),"
                   << "for key " << key ;           
        n_err++;
        continue;
      }
      if (clat.NumStates() == 0) {
        KALDI_WARN << "Empty lattice for key " << key;
        n_err++;
        continue;
      }
      clat_writer.Write(key, clat);
      n_done++;
    }
    KALDI_LOG << "Minimized " << n_done << " lattices, errors on " << n_err;
    return (n_done != 0 ? 0 : 1);
  } catch(const std::exception &e) {
    std::cerr << e.what();
    return -1;
  }
}